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| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2018 | Summit Materials, Inc. | SUM | 0 | -100,000 | 0 | -1,818,000 | |
| 09/30/2018 | Summit Materials, Inc. | SUM | 100,000 | 100,000 | 1,818,000 | 1,818,000 | $18.18 |
| 06/30/2015 | Summit Materials, Inc. | SUM | 0 | -200,000 | 0 | -4,430,000 | |
| 03/31/2015 | Summit Materials, Inc. | SUM | 200,000 | 200,000 | 4,430,000 | 4,430,000 | $22.15 |
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